Dodge Sprinter. Manual — part 265
command valve (5) to clutch K1 (6). The multiple-disc
holding clutch B1 (7) is deactivated (unpressurized).
The spring of the shift pressure shift valve (3) pushes
the valve back to its basic position.
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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Shift Phase - 2-1 Shift Phase 1
The 1-2/4-5 shift solenoid (1) (Fig. 20) is turned ON
to apply shift pressure (p-S) to the end face of the
1-2/4-5 command valve (5). This allows the command
valve to up-shift and the shift pressure coming from
the 1-2/4-5 shift valve (3) is routed to the holding
clutch B1 (7) via the command valve.
Fig. 20 Shift Phase - 2-1 Shift Phase 1
1 - 1-2/4-5 SHIFT SOLENOID
5 - 1-2/4-5 COMMAND VALVE
2 - 1-2/4-5 OVERLAP VALVE
6 - DRIVING CLUTCH K1
3 - 1-2/4-5 SHIFT PRESSURE SHIFT VALVE
7 - HOLDING CLUTCH B1
4 - 1-2/4-5 HOLDING PRESSURE SHIFT VALVE
8 - SHIFT PRESSURE REGULATOR VALVE
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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Simultaneously, the pressure in the releasing
clutch, K1 (6), is regulated at the 1-2/4-5 overlap
valve (2). The pressure in the K1 clutch as it disen-
gages is controlled during the shift phase depending
on
engine
load,
via
the
modulating
pressure
(p-MOD), and the shift pressure in clutch B1 (7). The
increasing shift pressure in clutch B1, which also
acts on the end face of the overlap valve, reduces the
overlap pressure.
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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Shift Phase - 2-1 Shift Phase 2
The pressure in clutch B1 (7) (Fig. 21) acting on
the end face of the 1-2/4-5 holding valve (4) forces the
valve to up-shift against the spring pressure and
allows line pressure (p-A) to pass through the com-
mand valve (5).
Fig. 21 Shift Phase - 2-1 Shift Phase 2
1 - 1-2/4-5 SHIFT SOLENOID
5 - 1-2/4-5 COMMAND VALVE
2 - 1-2/4-5 OVERLAP VALVE
6 - DRIVING CLUTCH K1
3 - 1-2/4-5 SHIFT PRESSURE SHIFT VALVE
7 - HOLDING CLUTCH B1
4 - 1-2/4-5 HOLDING PRESSURE SHIFT VALVE
8 - SHIFT PRESSURE REGULATOR VALVE
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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